Question

A glass rod 96 cm long with an index of refraction of 1.6 has its
ends ground to convex spherical surfaces of radii 8 cm and 16 cm. A
point object is in air on the axis of the rod 20.1 cm from the end
with the 8 cm radius.

(b) Find the location of the final image distance due to refraction
at both surfaces. (from the 8 cm diameter surface)